William Optics SPL (Super Planetary Long eye-relief) are 3 glasses dedicated to planetary observations in great contrast and a large, equal to 20 mm offset of exit pupil - ideal for observations in prescription spectacles.

The quality of optics • specially selected glass grades and anti-reflective layers make the SPL glasses give a beautifully corrected field free from aberration - the quality the planet deserves • High transmission and color reproduction will allow you to see details of targets that you may not have seen before • beans, ghosts, reflections - SPL glasses do not know this

High magnification and high contrast • WO SPL glasses serial series is 3 focal lengths: 3 mm, 6 mm and 12.6 mm - choose the focal length for your telescope to obtain the maximum magnification; if your telescope and the condition of the atmosphere allow - the eyepiece will not fail at the maximum useful magnifications

Large eye shadow offset ( eye relief ) Do you wear corrective glasses? If you have cylinders (eg astigmatism), you should observe with glasses. A pupil spacing of 20 mm allows observation without removing the glasses with virtually no loss of the field of view.